During a two-month period, Jesus Lesus enhanced security automation for the braintree/braintree_android and braintree/braintree_ios repositories by implementing CI/CD workflows using GitHub Actions and YAML. He introduced CodeQL-based code scanning and automated dependency reviews, ensuring that security checks run consistently on pull requests and main branch pushes. In braintree_ios, he addressed a reliability gap by modifying the dependency review workflow to execute on all event types, eliminating missed security checks and improving audit readiness. His work strengthened release governance and platform security, demonstrating depth in CI/CD pipeline design, security automation, and maintenance of mobile payment repositories in a regulated environment.